:root {
            --primary-color: #0066ed;
            --text-color: #333333;
            --bg-light: #f8f9fa;
            --border-color: #eaeaea;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            margin: 0;
            padding: 0;
        }
        header {
            background-color: #ffffff;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: var(--primary-color);
            text-decoration: none;
        }
        .nav-links a {
            margin-left: 20px;
            text-decoration: none;
            color: #555;
            font-weight: 500;
        }
        .nav-links a:hover {
            color: var(--primary-color);
        }
        .hero {
            background: linear-gradient(135deg, #001f4d 0%, #0066ed 100%);
            color: #ffffff;
            padding: 80px 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 40px;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 18px;
            opacity: 0.9;
            margin-bottom: 40px;
        }
        .btn-download {
            cursor: pointer;
            display: inline-block;
            background-color: #ffffff;
            color: var(--primary-color);
            padding: 15px 40px;
            font-size: 18px;
            font-weight: bold;
            border-radius: 30px;
            text-decoration: none;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            transition: transform 0.2s;
        }
        .btn-download:hover {
            transform: translateY(-2px);
            background-color: #f0f5ff;
        }
        section {
            padding: 60px 0;
            border-bottom: 1px solid var(--border-color);
        }
        section:nth-child(even) {
            background-color: var(--bg-light);
        }
        h2 {
            font-size: 28px;
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }
        h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background-color: var(--primary-color);
            margin: 10px auto 0;
        }
        .intro-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 100fr));
            gap: 30px;
        }
        .intro-card {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
        }
        .intro-card h3 {
            margin-top: 0;
            color: var(--primary-color);
        }
        .market-table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
        }
        .market-table th, .market-table td {
            padding: 15px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        .market-table th {
            background-color: #f1f3f5;
            font-weight: 600;
        }
        .up { color: #00b060; }
        .down { color: #f54336; }
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 100fr));
            gap: 25px;
        }
        .review-card {
            background: #fff;
            padding: 25px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }
        .review-user {
            font-weight: bold;
            margin-bottom: 5px;
            display: flex;
            justify-content: space-between;
        }
        .stars { color: #ffc107; }
        .steps {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
        }
        .step-item {
            flex: 1;
            min-width: 250px;
            text-align: center;
            background: #fff;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
        }
        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--primary-color);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px;
            font-weight: bold;
            font-size: 18px;
        }
        .faq-item {
            margin-bottom: 20px;
            background: #fff;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }
        .faq-item h3 {
            margin-top: 0;
            font-size: 18px;
            color: #222;
        }
        footer {
            background-color: #111;
            color: #888;
            padding: 40px 0;
            text-align: center;
            font-size: 14px;
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hero h1 { font-size: 30px; }
            .market-table th:nth-child(4), .market-table td:nth-child(4) { display: none; }
        }